NGC1499 -- H-alpha : 無料・フリー素材/写真
NGC1499 -- H-alpha / s58y
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Subject: NGC1499 -- California Nebula (H-alpha)Image FOV = 3.4 degrees (204 min) by 1 degree 50 minutes (110 min) Image Scale = 8 arc-second/pixelDate: 2006/12/08 and 2006/12/09Exposure: 15 x 10 minutes = 2h30m total exposure, ISO800, f/4.8 Filter: Baader 7nm H-alpha filter (Ha)Camera: Hutech-modified Canon 30DTelescope: SV80S 80mm f/6 + TV TRF-2008 0.8X reducer/flattener = 384mm FL, f/4.8Mount: Losmandy G-11Guiding: ST-402 autoguider and SV66 guidescope. MaximDL autoguiding software using 1-second guide exposures Processing: Raw conversion and calibration with ImagesPlus (dark frames only, no bias or flat frames); Aligning and combing with Registar; Gray comversion, levels, curves, Gaussian blur, JPEG conversion with Photoshop CS.Remarks: temperatures at end: 24F |
| 撮影日 | 2007-10-04 22:57:29 |
| 撮影者 | s58y |
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